<b>HTML网页中若何向swf传送参数</b>[Flash设计]

本教程主要介绍HTML网页若何获得形如test.html?foo=mytest的foo参数,以及在HTML网页中若何向swf传送参数.

1、在HTML网页中利用js获得参数.
我们知道HTML页面是在客户端履行的,这样要获得参数必须利用客户端脚本（如Javascript）,在这点上差别于服务器端脚本获得参数方法.下面的这段js代码获得HTML网页形如"test.html?foo=mytest&program=flash" "?"后全部参数.

<script language=javascript><!--var hrefstr,pos,parastr;hrefstr = window.location.href;pos = hrefstr.indexOf("?");parastr = hrefstr.substring(pos+1);if (pos>0){ document.write("全部参数:"+parastr);} else { document.write("无参数");}//--></script>
下面的这段js代码则可以越发细化获得HTML网页某一参数

<script language=javascript><!--function getparastr(strname) { var hrefstr,pos,parastr,para,tempstr; hrefstr = window.location.href; pos = hrefstr.indexOf("?") parastr = hrefstr.substring(pos+1); para = parastr.split("&"); tempstr=""; for(i=0;i<para.length;i++) { tempstr = para[i]; pos = tempstr.indexOf("="); if(tempstr.substring(0,pos) == strname) { return tempstr.substring(pos+1); } } return null;}// 获得program参数var programstr = getparastr("program");document.write(programstr);//--></script>

2、在HTML网页中向swf传送参数.
办法一:在网页中利用js,SetVariable设置flashobject中的变量,代码如:

// "HtmlToSwf"为网页中的flashobject IDHtmlToSwf.SetVariable("_root.info_str","Happy Newyear");
办法二:途径参数,如test.swf?foo=happy2005
办法三:利用FlashVars,以下主要介绍FlashVars的用法.利用FlashVars后嵌入HTML的flashobject代码以下:

<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="550" height="400" id="FlashVars" align="middle"><param name="allowscriptAccess" value="sameDomain" /><param name="movie" value="FlashVars.swf" /><param name="FlashVars" value="foo=happy2005&program=flash&language=简体中文-中国" /><param name="quality" value="high" /><param name="bgcolor" value="#ffffff" /><embed src="FlashVars.swf" quality="high" bgcolor="#ffffff" width="550" height="400" name="FlashVars" align="middle" allowscriptAccess="sameDomain" FlashVars="foo=happy2005&program=flash&language=简体中文-中国" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />

通过上面的代码,在SWF(FlashVars.swf)中便可以直接获得foo、program、language变量数据.FlashVars.fla获得FlashVars参数的代码以下:

// 成立三个文本字段_root.createTextField("foo_txt",1,0,0,16,16);_root.createTextField("program_txt",2,0,32,16,16);_root.createTextField("language_txt",3,0,64,16,16);foo_txt.autoSize = true;foo_txt.border = true;program_txt.autoSize = true;program_txt.border = true;language_txt.autoSize = true;language_txt.border = true;// 获得FlashVars变量foo_txt.text = "HTML中的foo参数:"+foo;program_txt.text = "HTML中的program参数:"+program;language_txt.text = "HTML中的language参数:"+language;

3、二者的有效结合.
在HTML网页中利用js获得参数,然后将获得的参数作为FlashVars写入flashobject传送给swf.代码以下:

<script language=javascript><!--function writeflashobject(parastr) { document.write("<object classid=\"clsid:d27cdb6e-ae6d-11cf-96b8-444553540000\" codebase=\http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0\ width=\"550\" height=\"400\" id=\"FlashVars\" align=\"middle\"\>\n"); document.write("<param name=\"allowscriptAccess\" value=\"sameDomain\" /\>\n"); document.write("<param name=\"movie\" value=\"FlashVars.swf\" /\>\n"); document.write("<param name=\"FlashVars\" value=\""+ parastr +"\" /\>\n"); document.write("<param name=\"quality\" value=\"high\" /\>\n"); document.write("<param name=\"bgcolor\" value=\"#ffffff\" /\>\n"); document.write("<embed src=\"FlashVars.swf\" quality=\"high\" bgcolor=\"#ffffff\" width=\"550\" height=\"400\" name=\"FlashVars\" align=\"middle\" allowscriptAccess=\"sameDomain\" FlashVars=\""+ parastr +"\" type=\"application/x-shockwave-flash\" pluginspage=\"http://www.macromedia.com/go/getflashplayer\" /\>"); document.write("</object\>");}function getparastr() { var hrefstr,pos,parastr,para,tempstr1; hrefstr = window.location.href; pos = hrefstr.indexOf("?") parastr = hrefstr.substring(pos+1); return parastr;}var parastr = getparastr();writeflashobject(parastr);//--></script>